<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>js测试</title>
		<script>
			var a={a1:"hello",a2:123};
			alert(a.a1+''+a.a2);
			alert(typeof a);//object
			alert(typeof a.a1);
			
		</script>
	</head>
	<body>
	</body>
</html>
